Improvement in electro-magnetic motors



OHN TAGGART.

Improvement in Electro-Magnetic Motor.

N0. ZLBU, Patentedjune11,1872.

. NITED STATES JOHN TAGGART, OF BOSTON, MASSACHUSETTS.

IMPROVEMENT IN ELECTRO-MAGNETIC MOTORS.

Specification forming part of Letters Patent No. 127,810, dated June 11,1872.

To allpcrsons to whom these presents may come:

Be it known that I, JOHN TAGGART, of Boston, of the county of Suffolk and State of Massachusetts, have invented a new and useful or Improved Electro-Magnetic Motor or Engine, and do hereby declare the same to be fully described in the following specification and represented in the accompanying drawing, of which- Figure 1 is a top view, and Fig. 2 a longitudinal section, and Fig'. 3 a transverse section, of it.

The nature of my invention consists in a rotary shaft and ratchet-wheel, arranged and combined with a ring or pawl-carrier and pawls, and with helices, sliderods, armatures, and a circuit-breaker, all substantially as hereinafter described. The purpose of the motor is to effect a rotary motion from the reciprocating rectilinear motion of the pawlcarrier and slide-rods, and thereby produce a cheap and efficient electro-magnetic engine, having advantages over many, if not all, others heretofore in use, and being specially useful for operating a sewing-machine at a trifling expense, thereby saving to persons or attendants on such machines all necessity of working a pedal to put and keep them in operation, and the dangerous results to health incident to a long or continued use thereof.

In such drawing, A A and B B are two pairs of helices or electric coils of wire, arranged in manner as shown, and with a horizontal shaft, O, disposed midway between them, such shaft y being duly supported in boxes or standards I) l), and provided with a iiy-wheel, O. At the outer ends of each pair of coils A A or B B is a stationary armature, E, of iron, supported by a standard, a, the coils being sustained in position by suitable standards F F F F, erected on a wooden base, G. Vithin each coil, and arranged concentrically of it, and so as to be capable of sliding lengthwisewithin or through the coil, is a cylindrical rod, H, each pair of such rods being connected at their inner ends by a bar, I, of soft iron. Furthermore, there is Xed on the shaft O a ratchet-wheel, b,which is encompassed by a ring or pawl-carrier, c, connected to the four rods H, and having pivoted to it two pawls, d e, to cooperate with the ratchet-wheel, all being arranged as shown.

Springs f j', fastened to the ring, and bearing upon the pawls, serve to keep them in contact with the ratchet-wheel. Underneath the shaft O is a pole-changer or circuit-breaker, consisting of a lever, g, and three metallic plates or blocks, h t' k, the same being as shown in top view in Fig. 4, which also exhibits the ring e as provided with a small stud or projection, l, extended into a notch, m, made in the shorter arm of the said lever g. The fulcrum of the lever is seen at a. The three plates are fixed on an insulator, o, of glass or hard rubber,77 and separated from each other by spaces p p, between them. The two outer plates h 7c have circuit-wires q 1' leading from them to the two pairs of coils, from whence other wires, s t, lead to one of two battery-connections, u o. Furthermore, from the other of the two battery-connections another circuit-wire, fw, is led to the pivot of the switch or lever g. The wire of one coil of the pair connects with that of its fellow-coil.

If we suppose an electrical battery to have its circuitwires applied to the battery-connections hereinbefore mentioned, we shall find that the induced current of electricity will first be caused to pass through one pair of the coils, whereby these connected rods will be converted into a magnet, which, being attracted by the next adjacent stationary armature, will move toward and against such armature, and in so doing will move the ring and the other connected rods, and force one of the pawls against the ratchet-wheel so as to revolve the latter and its shaft. In the mean time the pole-changer, switch, or lever will be moved so as to break the circuit and open that of the other pair of coils, which in turn will render their slide-rods magnetic, whereby they will be moved up to their armature, and, as a consequence, the pawl before in action will slip over the ratchet-wheel, and the other pawl will be caused to turn the said wheel. A continuous rotary motion of the shaft and flywheel will thus be effected.

From the above it will be seen that the ratchet, its shaft, and ily-wheel are free to revolve independently of the pawls or apparatus for revolving such ratchet, and consequently the stoppage of motion of the paWl-carrier or ring and the parts directly connected with it :may take place, and the ily-Wheel shaft and lthe' ratchet will continue to revolve until stopped by felation.

I make no claim to a horizontal reciprocating-en gine, constructed as described on pages 206, 207 of Daviss Manual of Magnetism,

twelfth editition, 1857.

I claim- The rotary shaft C and ratchet-wheel b, ar-

ranged and combined with the pawl-oarrier c and its pawls, and with helices, slide-rods, armatures, and a circuit-breaker, all belng substantially as described.

JOHN TAGGART.

Witnesses R. H. EDDY, J. R. SNOW. 

